io_add_notify() didn't set refcount so io_remove() crashed for it.
io_add_notify() didn't set refcount so io_remove() crashed for it.

--HG--
branch : HEAD

jwm/dovecot-notmuch,jkerihuel/dovecot,dscho/dovecot,dscho/dovecot,jkerihuel/dovecot,jkerihuel/dovecot,jwm/dovecot-notmuch,dscho/dovecot,jkerihuel/dovecot,jkerihuel/dovecot,dscho/dovecot,dscho/dovecot,jwm/dovecot-notmuch,jwm/dovecot-notmuch,jwm/dovecot-notmuch